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(Mode'L) G. S. ROMINGER.. Sewing Machine.

No. 242,372. Patented May .31, 1881.

01 70/7012" 5 mffl w OW I N. PETERS Plmo-Lhbognpher. Wlshinglon. II 1 UNITED STATES PATENT ()FFICE.

GEORGE S. ROMINGER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE AMERICAN BUTTON HOLE, OVERSEAMING AND SEWING MACHINE COMPANY, OF SAME PLACE.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 242,372, dated May 31, 1881.

Application filed August 16, 1880. (ModeL) T 0 all whom it may concern:

Be it known that I, GEORGE S. ROMINGER, a citizen of the United States, residing in Philadelphia, Pennsylvania, have i n vented certain Improvements in Sewing-l\Iachines, of which the following is a specification.

The main object of my invention is to insure the steadiness of the needle-bar ot a sewingmachine, and this object I attain in the manner which I will now proceed to describe, reference being had to the accompanying drawings, in which- Figure 1 is a front view of the end portion of the stationary arm, needle-bar, and presserbar of a sewing-machine with my improvements; Fig. 2, a side view of Fig. 1; Figs. 3 and 4., perspective views; Fig. 5, a sectional plan on the line 1 2; Fig. 6, a rear view of the erosshead; Fig. 7, a section of the prcsserbar on the line 3 4.

The stationary arm A of a sewing-machine has two projections, a a, in which the reciprocating needle-bar B and the presser-bar l) are arranged to slide.

G is the driving-shaft, carrying a face-plate, H, a crank-pin on which is provided with an anti-friction roller adapted to a curved recess (shown in Fig. 6) in the back of a. cross-head, I, which is secured to the needle-bar. The cross-head is made perfectly true at the back, and bears lightly against the face-plate, so as to prevent the turning of the needle-bar and obviate all inward vibration toward the faceplate during the .operation of the machine. One wing, c, of the cross-head l is constructed to partially embrace and bear against the presser-bar D, which thus adds to the lateral steadiness of the needle-bar and obviates vibrations which, in the absence of this arrangement, might be imparted to the said needlebar by the action of the anti-friction roller of the crank-pin on the edge of the curved recess in the hack of the cross-head. IVhen the presser-bar is lowered, as shown in Fi 4, the forked plateis mainly containedwithin theslot 5 a, and thus the presser-bar is prevented from turning in its bearings; but when the presscrbar has been raiscd,as shown in Fig. 3, it can be so turned by the handle 10 that the lower ends of the prongs will bear on the top of the 0 projection a of the stationary arm, and the presser-bar will he thus retained in its elevated position. There is a-notherobject in adopting this forked plate, the relation of which to the presser-ba-r will be best observed in the sec- 5 5 tional plan, Fig. 7. The bar itself has a hearing in the lower projection, a, of the stationary arm, so that when the bar becomes loose all that is necessary to take up the slack is to slightly bend the prongs of the fork outward in the direction ot'the arrows, Fig. 7, when a sufficiently tight lit ot' the lower end of the bar in its hearings will be assured, and it is important that there should always be a proper steadiness ot' the presser-bar, as reliance is placed upon it for imparting steadiness to the needle-bar.

I claim as my invention-- 1. The combination of the pres.-er-bar, the shaft G, and its face-plate ll with the needlebar B, its cross-head 1, adapted to bear against the face-plate, and having wing e, constructed to partially embrace the said presser-bar, all substantially as sp. cified.

:5. The combination of the. presser-bar and its forked plate K with the projection a of the stationary arm, the said projection having a slot, at, adapted to receive ihe said bar and forkedplate, as described.

In testimony whereof I have signed my name to this specification in the presenceof two subscribing witnesses.

GEO. S. ROMINGER.

Witnesses J. J. BUCHEY, HENRY Howson, Jr. 

